She appeared in the season 4 episode "Aunt Myra Doesn't Pee a Lot" in Herb and Judith's wedding. She met Alan and told to him that she was engaged to Herb before he met Judith. They started kissing and attempted to have sex in the coatroom. Alan said that he didn't want to do it, but Shannon wanted to do it, so they pretended they were doing it to make Judith and Herb jealous. Alan knocked the door while she were screaming: "Oh Alan Harper, yes!!!!!". Later, Alan entered in the room where the wedding was held and said "I'm Alan Harper, and I'm not having sex!"
- She and Alan had sex in the coatroom in Herb and Judith's wedding, just like Charlie and Judith's sister, Liz, had sex in the coatroom at Alan and Judith's wedding.